#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int a = 0;
	while (scanf("%c", &a) != EOF)
	{
		int ch = getchar();
		if ((a >= 'a' && a <= 'z') || (a >= 'A' && a <= 'Z'))
		{
			printf("%c is an alphabet.\n", a);
		}
		else
		{
			printf("%c is not an alphabet.\n", a);      
		}
	}
	return 0;
}